Had an on-campus interview that was essentially all fit, got an on-site through that. On-site interview was with Windows group, 4 back to back. Was asked coding questions in 2 of them, including one about writing a program in C++ to do matrix multiplication. One interviewer was extremely rude, ridiculing my answers to all of his fit questions and giving me an extremely vague coding question about how to program an elevator control unit. Got upset when I asked him for details about the specs.

Three rounds of interview starting with phone screening, middle round of online interview and final round of three interviews all schedule within a couple weeks time. Interviews were Microsoft recruiters followed by employees